Carpet cleaning instrument

The invention discloses a carpet cleaning instrument, relates to the technical field of cleaning appliances, and is used for solving the problems that hair is easy to wind on a brush and granular pollutants are inconvenient to clean in the existing way of cleaning a carpet by holding the brush with a hand. The carpet cleaning instrument comprises a shell, an upper cavity and a lower cavity which are arranged up and down are formed in the shell, and a cleaning assembly is arranged in the lower cavity; the cleaning assembly comprises a first rotating roller, a second rotating roller, a third rotating roller and a fourth rotating roller which are sequentially arranged from front to back, a first scraping plate is arranged on the outer wall of the first rotating roller, a second scraping plate is arranged on the outer wall of the second rotating roller, and scraping teeth are tightly arranged on the acting surfaces of the first scraping plate and the second scraping plate. Scraping teeth on the first scraping pla